audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Encoding table > < Encoding operating and display unit, Climatronic control unit J255

A4 Cabriolet Mk2

Encoding control unit
Encoding control unit
  Note
Control units can only be encoded using testers in which a workshop number has been entered.
–  With the ignition switched off, connect up vehicle diagnostic, testing and information system -VAS 5051A- using, for example, diagnostic wire -VAS 5051/5A- and K-wire adapter -VAS 6017B- (or K-wire adapter -VAS 6017A-) to the 16-pin diagnostic socket in the vehicle → Chapter.
–  Switch on ignition.
–  Use address word “08” to select air conditioner/heater electronics → Chapter.
Requirements:
t  Fault memory interrogated → Chapter, all displayed faults eliminated and fault memory erased
t  Air conditioner switched on (“Auto” mode).
   
Indicated on display of vehicle diagnostic, testing and information system -VAS 5051A-:
–  Select function “07 - Encoding control unit”.
  A87-0314
Indicated on display of vehicle diagnostic, testing and information system -VAS 5051A-:
t  Prompt for entering code appears in display zone -1-.
t  Input keypad appears in display zone -2-.
t  Fourth line of display zone -3- indicates currently valid code, with previous code in brackets.
t  Fifth line of display zone -3- indicates workshop code entered in vehicle diagnostic, testing and information system -VAS 5051A-.
–  Encode the operating and display unit, Climatronic control unit -J255- in line with the optional extras fitted and the vehicle model, encoding table → Chapter.
–  Use keypad -2- to enter required code in line with encoding table.
–  Confirm entry by touching Q key in display zone -2-.
  A87-0324
The following appears on the display of the vehicle diagnostic, testing and information system -VAS 5051A- after a brief delay.
t  Display zone -1- indicates “Vehicle system encoding performed”.
t  Display zone -2- indicates control unit identification with new code and old code in brackets.
  Note
t  Touch ← key to return to selection program.
t  If an incorrect code is entered, the fault message “Function unknown or cannot be implemented at present” is displayed and the old code remains stored.
t  At the factory (as-delivered condition for replacement part), the encoding for the operating and display unit, Climatronic control unit -J255- is currently “00000”.
t  The encoding of the vehicle version sets the operating and display unit, Climatronic control unit -J255- to the different models:
t  The “basic configuration” is applicable to the Saloon, Avant and Coupe.
t  On the Cabrio, the heated rear window function is differently configured, the control characteristic curve accordingly modified and, with the convertible top open, control action is implemented via the vent temperature senders (left vent temperature sender -G150-, right vent temperature sender -G151- etc.).
t  If the operating and display unit, Climatronic control unit -J255- is encoded for a vehicle with heated windscreen -Z2- as optional extra, diagnosis and the heated windscreen actuation function are enabled.
t  If the operating and display unit, Climatronic control unit -J255- is encoded for a vehicle with “sun roof with solar cells” (solar cells -C20-) as optional extra, the following settings are currently made on the air conditioner unit after switching off the ignition:
–  Both the temperature flap control motors (left temperature flap control motor -V158- and right temperature flap control motor -V159-) are set to the “cold” position.
–  The central flap control motor -V70- is set to the “air to dash panel vents” position and the defroster flap is closed by way of the defroster flap control motor -V107- (air to footwell).
–  The fresh-air flap is opened (air flow flap control motor -V71-) and the recirculated-air flap closed (air recirculation flap control motor -V113-).
  A82-0239

Encoding table > < Encoding operating and display unit, Climatronic control unit J255